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debug

Systematic root-cause isolation for test failures, runtime errors, or unexpected behavior. Narrow hypothesis → verify → fix.

plugins/epicsagas/epic-harness/skills/debug/SKILL.md

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# Debug — Systematic Debugging

## Iron Law

NO FIXES WITHOUT ROOT CAUSE INVESTIGATION FIRST. Symptom fixes are whack-a-mole debugging.

## Process

### 0. Recall
- Query the knowledge graph: `epic mem search "ERROR_MESSAGE_OR_FILE"` for the error message or file name
- Check if a `resolution` or `pattern` node exists for this error category
- If a past resolution exists, apply it directly instead of re-debugging from scratch

**Why**: Past resolutions save 10-30 minutes of re-investigation. The knowledge graph exists so you don't repeat work.